HD 128198
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes[1] |
| Right ascension | 14h 34m 38.4998s[2] |
| Declination | +36° 37′ 33.829″[2] |
| Apparent magnitude (V) | 6.1657[3] |
| Characteristics | |
| Evolutionary stage | red giant branch[4][2] |
| Spectral type | K4III[5] |
| U−B color index | +1.59[6] |
| B−V color index | +1.38[6] |
| Astrometry | |
| Radial velocity (Rv) | −9.88±0.20[3] km/s |
| Proper motion (μ) | RA: −24.973[2] mas/yr Dec.: −46.654[2] mas/yr |
| Parallax (π) | 5.9435±0.0293 mas[2] |
| Distance | 549 ± 3 ly (168.3 ± 0.8 pc) |
| Absolute magnitude (MV) | +0.07[1] |
| Details | |
| Mass | 2.6[2] M☉ |
| Radius | 24[2] R☉ |
| Luminosity | 214[2] L☉ |
| Surface gravity (log g) | 2.01[2] cgs |
| Temperature | 4,420[2] K |
| Metallicity [Fe/H] | −0.11±0.09 [7] dex |
| Age | 558[2] Myr |
| Other designations | |
| BD+37°2551, HD 128198, HIP 71277, HR 5448, SAO 64227[8] | |
| Database references | |
| SIMBAD | data |
HD 128198 is a giant star in the northern constellation of Boötes, about 549 light years away.
References
- ^ a b Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015.
- ^ a b c d e f g h i j k l Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b Famaey, B.; et al. (2005), "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters", Astronomy and Astrophysics, 430: 165–186, arXiv:astro-ph/0409579, Bibcode:2005A&A...430..165F, doi:10.1051/0004-6361:20041272, S2CID 17804304.
- ^ Gontcharov, G. A. (2011). "The red giant branch in the Tycho-2 catalogue". Astronomy Letters. 37 (10): 707. arXiv:1607.00557. Bibcode:2011AstL...37..707G. doi:10.1134/S1063773711090040.
- ^ Sato, K.; Kuji, S. (November 1990), "MK classification and photometry of stars used for time and latitude observations at Mizusawa and Washington", Astronomy and Astrophysics Supplement Series, 85 (3): 1069–1087, Bibcode:1990A&AS...85.1069S.
- ^ a b Guetter, H. H.; Hewitt, A. V. (June 1984), "Photoelectric UBV photometry for 317 PZT and VZT stars", Publications of the Astronomical Society of the Pacific, 96: 441–443, Bibcode:1984PASP...96..441G, doi:10.1086/131362.
- ^ Taylor, B.J. (February 1999), "Catalogs of temperatures and [Fe/H] averages for evolved G and K stars", Astronomy and Astrophysics Supplement, 134 (3): 523–524, Bibcode:1999A&AS..134..523T, doi:10.1051/aas:1999153.
- ^ "HD 128198". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2025-04-17.
External links
